WTH - Someone who can help me get back my hacked Y! Mail- Decent PAY

My Y! Mail was hacked recently and we could not retrieve the password.
The hacker has sent a spam mail to everyone from our mail while at the same time taking a backup of all our confidential mails and then a day after he changed the password after deleting all the mails.

We can no longer access the mail. Even though we reported to Y! Support them keep cool on this scenario.
I need some experienced person (ethical hacker ) who can help us get our mail I'd back( to prevent misuse of our business contacts) and trace the person so that we can act legally on him.

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